it's all very strange. I tried something in Montage Center last week. Cannot remember particularly what I was doing but, the program either crashed or closed down normally, but now the program will not start.It is a stand-alone program, so should run okay without TC loaded. Which is normally the case. It appears it is looking for something to load/open but cannot find it. What this could be I have no idea. Perhaps I'll just go back to using Adobe Premier pro.